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CN-119664371-B - Deviation preventing structure for shield tunnel construction

CN119664371BCN 119664371 BCN119664371 BCN 119664371BCN-119664371-B

Abstract

The invention provides a shield tunnel construction deviation prevention structure which comprises a shield machine, wherein a pipe piece is connected to one axial side of the shield machine, an adjusting mechanism is arranged between the shield machine and the pipe piece and is suitable for driving the shield machine to move in the radial direction of the pipe piece, a positioning groove is formed in one side, facing the pipe piece, of the shield machine, a protection opening communicated with the positioning groove is formed in the radial outer side of the shield machine, and the protection opening is a protection opening capable of being opened and closed. This shield tunnel construction prevents off-tracking structure utilizes angle sensor and angle sensing board through sensing mechanism and adjustment mechanism matched with setting mode, is convenient for respond to the angular displacement of shield machine fast, and the adjustment mechanism of being convenient for can deflect whole shield machine, is convenient for the gesture adjustment to whole shield machine, makes its shield machine can carry out the small circle and removes, reduces the wearing and tearing of blade disc, improves the life of shield machine.

Inventors

  • ZENG HONGBO
  • XIE XIONGYAO
  • Tu Jinguang
  • CAO HAIBO
  • CHEN WEI
  • ZHANG YIMING
  • LI JIANGKUN
  • DING YANPING
  • TIAN YAOYU
  • SHI ZHOU

Assignees

  • 中交二公局第一工程有限公司
  • 同济大学

Dates

Publication Date
20260508
Application Date
20241210

Claims (7)

  1. 1. The utility model provides a shield tunnel construction prevents off-tracking structure, includes shield machine (1), its characterized in that: one axial side of the shield machine (1) is connected with a duct piece (2), an adjusting mechanism (5) is arranged between the shield machine (1) and the duct piece (2), and the adjusting mechanism (5) is suitable for driving the shield machine (1) to move in the radial direction of the duct piece (2); A positioning groove (31) is formed in one side, facing the duct piece (2), of the shield machine (1), a matched angle sensor (34) and an angle sensing plate (32) are arranged between the shield machine (1) and the duct piece (2), the angle sensor (34) and the angle sensing plate (32) are both positioned at the inner side of the positioning groove (31), the angle sensor (34) is electrically connected with the adjusting mechanism (5), a protection opening communicated with the positioning groove (31) is formed in the radial outer side of the shield machine (1), and the protection opening is a protection opening capable of being opened and closed; The adjusting mechanism (5) comprises a bearing column (51) fixed on the inner wall of the duct piece (2), a driving piece (52) arranged on the bearing column (51), a rotating shaft (53) connected with the output end of the driving piece (52) in a transmission way, and a connecting rod (54) for supporting the rotating shaft (53); The output end of the driving piece (52) is provided with an eccentric disc (551), the driving piece (52) is arranged to be suitable for driving the eccentric disc (551) to rotate around the axis of the output end of the driving piece (52), one side of the eccentric disc (551) deviating from the driving piece (52) is provided with a rotating column (553), and the rotating column (553) is movably connected with a fixing frame (4) of the shield machine (1).
  2. 2. The shield tunnel construction deviation prevention structure according to claim 1, wherein the adjusting mechanism (5) comprises a plurality of balls (552), the balls (552) are distributed in an annular array and are embedded between the eccentric disc (551) and the fixing frame (4), the eccentric disc (551) and the fixing frame (4) are suitable for moving in the radial direction through the balls (552), the fixing frame (4) is provided with an embedded groove (56), and one end of the rotating column (553) deviating from the eccentric disc (551) is clamped in the embedded groove (56).
  3. 3. The shield tunnel construction deviation prevention structure according to claim 1, further comprising a protection assembly (33), wherein the protection assembly (33) is opened and closed to connect the protection opening, and the protection assembly (33) comprises: The protection plate (332), the inside of the protection opening is provided with a clamping groove (331), and the protection plate (332) slides on the inside of the clamping groove (331); the rubber strip (333), rubber strip (333) is fixed in the one end of guard plate (332), section of jurisdiction (2) towards one side of shield structure machine (1) with rubber strip (333) laminating mutually.
  4. 4. A shield tunnel construction deviation prevention structure according to claim 3, wherein the protection assembly (33) further comprises: the pressure spring (334), the said pressure spring (334) connects between said draw-in groove (331) and said guard plate (332), the said pressure spring (334) is set up and suitable for pushing the said guard plate (332) to move towards the said segment (2); The limiting rod (335), the other end that limiting rod (335) was fixed in guard plate (332), pressure spring (334) cover is located the inboard of limiting rod (335), the slotted hole with limiting rod (335) sliding connection is seted up to the inner wall of draw-in groove (331).
  5. 5. A shield tunnel construction deviation prevention structure according to claim 3, characterized in that a limit block (36) is arranged on one side of the protection plate (332) away from the positioning groove (31), the positioning groove (31) is arranged above the protection plate (332), a positioning component (35) is arranged, and the positioning component (35) is suitable for restraining the limit block (36) when the protection plate (332) closes the protection opening.
  6. 6. The shield tunnel construction deviation prevention structure according to claim 5, wherein the two sides of the inner wall of the positioning groove (31) are respectively provided with a rotating groove (351), the positioning assembly (35) comprises positioning rods (352), the end parts of the positioning rods (352) are respectively in one-to-one correspondence with the rotating grooves (351), the end parts of the positioning rods (352) are rotationally connected to the inner sides of the rotating grooves (351), the positioning rods (352) are provided with protruding portions (353), and one side of the limiting block (36) in the length direction of the clamping groove (331) is in clamping connection with the protruding portions (353).
  7. 7. The shield tunnel construction deviation prevention structure according to claim 1, wherein the shield tunneling machine (1) comprises a cutter head (11), a front shield (12), a middle shield (13) and a tail shield (14) which are sequentially connected along an axis direction, the tail shield (14) is connected with the duct piece (2), the positioning groove (31) is formed in the top of the tail shield (14), the angle sensor (34) is connected with the duct piece (2), the angle sensing plate (32) is fixed on the inner wall of one side, opposite to the duct piece (2), of the positioning groove (31), and the angle sensor (34) is opposite to the angle sensing plate (32).

Description

Deviation preventing structure for shield tunnel construction Technical Field The invention relates to the technical field of shield tunnel construction, in particular to a deflection-preventing structure for shield tunnel construction. Background In the construction process of a shield tunnel, due to the influence of various factors such as geological conditions, construction equipment, operation technology and the like, a shield machine is easy to deviate, the deviation of the shield not only can influence the construction quality of the tunnel, but also can possibly cause adverse effects on surrounding environment, therefore, the establishment of an effective deviation prevention structure is crucial for ensuring the safety and quality of tunnel construction, for example, application number 201810886616.1 discloses a control method for a deviation-load-resistant shield propulsion system, a circular partition plate on the system is fixedly connected with a shield body, a cutter head cuts rock and soil and is conveyed out through a screw conveyor, the right end of a hydraulic jack is propped against a duct piece through a supporting shoe, the whole shield is pushed forward through reaction force on the duct piece, and all hydraulic cylinders in the propulsion system are uniformly arranged. The control method of the shield propulsion system is characterized in that the radian angle theta and the azimuth angle phi are calculated according to geomechanical parameters during shield tunneling, so that the start or stop of a hydraulic cylinder group which is annularly, equidistantly and continuously arranged in the propulsion system is controlled, and the problem of unbalanced load of the shield tunneling is solved by adjusting the distribution of the hydraulic cylinders in real time. However, aiming at the deviation of the direction of the small-sized shield machine, the direction of the small-sized shield machine in the inner cavity of a construction tunnel needs to be adjusted, the existing deviation correcting system utilizes the adjustment of the gesture of a cutter head to enable the shield machine to move in a small range, and the abrasion of a hob on the cutter head is large in the process, so that the service life of the shield machine is influenced. Therefore, in order to solve the problems, the invention provides the anti-deviation structure for the shield tunnel construction, which can control the whole posture adjustment of the shield machine and reduce the abrasion of the hob on the cutterhead. Disclosure of Invention The invention provides an anti-deviation structure for shield tunnel construction, which aims to solve the technical problems existing in the prior small shield machine posture adjustment. According to one purpose of the invention, the invention provides a deflection preventing structure for shield tunnel construction, which comprises a shield machine, wherein one axial side of the shield machine is connected with a duct piece, an adjusting mechanism is arranged between the shield machine and the duct piece, and the adjusting mechanism is suitable for driving the shield machine to move in the radial direction of the duct piece; The shield constructs the machine orientation one side of section of jurisdiction has seted up the constant head tank, the radial outside of shield constructs the machine has seted up the intercommunication the protection opening of constant head tank, protection opening is the protection opening that can open and close, shield constructs the machine with install assorted angle sensor and angle sensing board between the section of jurisdiction, angle sensor with angle sensing board all is located the inboard of constant head tank, angle sensor with guiding mechanism electric connection. Preferably, a fixing frame is arranged on one side, close to the duct piece, of the shield machine; The adjusting mechanism comprises a driving piece, an eccentric disc and a rotating column which are sequentially connected along the axial direction of the duct piece, the driving piece is installed on the inner side of the duct piece, the output end of the driving piece is provided with the eccentric disc, the driving piece is arranged to be suitable for driving the eccentric disc to rotate along the axial line of the output end of the driving piece, the rotating column is arranged on one side, deviating from the driving piece, of the eccentric disc, and the rotating column is movably connected with the fixing frame. Preferably, the adjusting mechanism comprises a plurality of balls, the balls are arranged in an annular array and are embedded between the eccentric disc and the fixing frame, the eccentric disc and the fixing frame are suitable for moving in the radial direction through the balls, an embedded groove is formed in the fixing frame, and one end, deviating from the eccentric disc, of the rotating column is clamped in the embedded groove. Preferably, this shield tunnel